loomis



(No-Model.)

0. P. LOOMIS & H. W. COOLBY.

REGULATOR FOR DYNAMO ELECTRIC MACHINES. N0. 337,776.- Patented Mar. 9;1886.

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OSBOBN P. LOOMIS AND HENRY VJ. QQOLEY, OF LYNN, MASS LOHUSETTS.

REGULATOR FOR DYNAMO=EL SP 'CEPICATION forming part of Letters PatentApplication filed September 22, 18%. Serial No. 177,792.

To all whom it may concern:

Beit known that we, OSBORN P. Looms and HENRY W. GooLEY, citizens of theUnited States, and residents of Lynn, in the county of Essex and Stateof Massachusetts, have invented certain new and useful lm 'iroveinentsin Regulators for Dynamo-Electric Generators, of which the following isa specification.

Our invention relates to the automatic regulation of dynamo electricgenerators.

It has for its object the regulation of the working-circuit by means ofa variable resistance in a shunt to the armatures; and it consists inthe application of principles subsequently set forth, and includes suchnovelty as is embraced by the claims at the end of this specification.

The drawing hereunto annexed is described below by letters of referencein so far as our invention is concerned.

In the single figure, A is a dynamoelectric machine of any type, havingarmature and field-magnets G.

B is an electro-magnet in a shunt-circuit to the armature, and providedwith a pole-piece, D, at one end.

E is a back piece to the magnet B, and is bent into the shape showni.6., having a single rectangular bend.

F is a lever-armature, shaped as nearly as possible as shown-t. 0.,provided with a projection,f, opposite the pole-piece D, pivoted l toone end of the piece E and to the pistourod G of the dash pot H, andhaving one end resting upon contact-points I, which are connectedtogether by conductors J, of comparatively high resistance.

K is a shunt'circuit, above referred to, and passes not only through themagnet- B, but also through one or more of the contact-pieces I andlever-armature F, and Z represents the main circuit, in which may beincluded are lamps M, or other translating devices.

The object of the dash-pot H, pivoted to the end of the piece E, asshown, is for the usual purpose of dash-pots.

The operation depends upon the'principle that the short-circuiting orshunting the armature more or less produces a variation in CTRE G M ACl-l No. 337,776, Eider-eh 9,1886.

(X0 model.)

the working-circuit; also, when the workingcircuit in a shunt to thearmature varies. Further, when the working-current varies, the magnetstrength of the inaghet B also varies. In other words, if more lamps areintroduced more currenttlows through the shunting arrangement, so thatthe lever F is pulled to the right from the position shown in dottedlines, and more of the resistances J are thereby introduced.Consequently more current is furnished to the main current as required.

\Ve are aware that variable resistances have been introduced into ashunt around the field-magnets, and we therefore lay no claim to such adisposition of the said variable resistance.

Having stated the object of our invention, having described it byreference to the accompanying drawings, having described its modasoperandi, and observing that we do not confine ourselves to the exactproportions shown in the drawing or to the exact operations mentioned,what'we consider novel, and desire to claim as the invent-ion secured tous by the hereinbefore in part recited Letters Patent, 1s-

1. In combination with the armature and r field-magnets of adynai'no-eleetric generator,

a variable resistance and electric automaticoperatiug mechanismtherefor, both located in a shunt-circuit to said armature, the lamps orother translating devices being in series with said fieldinagnets,substantially as described.

2. In combination with a dynamoelectric generator, a regulatorconsisting of the combination of an armature, a shunt to the armature,an electromagnet in said shunt and provided with a pole-piece at oneend, a back piece, E, for said magnet, bent at right angles, alever-armature, F, pivoted at one end of said back piece, having aprojection upon it opposite said polepiece and pivoted to a piston of adash-pot, which is pivoted to the'other end of the abovenamed backpiece, and a series of contact-pieces connected together by conductorsof high resistance arranged in an arc to the axis of rotation of theabove-named pivoted armature, and one of said contact pieces being inelectrical contact with said presence of two Witnesses, this 7 t-h dayof Seppivoted armature, the said contact-pieces, tember, 1885.

one or more, and said pivoted armature being in a shunt-circuit to thearmature of the dynamo-electric generator, substantially as described.Witnesses:

In testimony that we claim the foregoing as EBEN F. P. SMITH,

OSBORN P. LOOMIS. HENRY W. OOOLEY.

' our invention We have signed our names, in 'W ALTER F. FISHER.

